What does '0.050 inch undersize' mean for these bearings?

This means the bearings are manufactured to be 0.050 inches smaller in diameter than the original factory size. They are intended for use when the engine's crankshaft has been machined down by 0.050 inches during a rebuild to correct wear or damage.

What is the main purpose of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block and allow it to rotate smoothly. They maintain the precise oil clearance needed to lubricate the rotating assembly and ensure proper oil pressure.

Does this kit include everything needed for the main bearings?

This kit contains the crankshaft main bearings themselves. You will need to refer to the manufacturer's installation instructions for any additional components or preparation steps required for installation.

1991-1993 Nissan NX Crankshaft Main Bearing Set

Name: ACL Nissan 4 1998cc SR20DE/DET 1991-98 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-nissan-4-1998cc-sr20de-det-1991-98-engine-crankshaft-main-bearing-set-t14-631560
Price: 21.63 USD
Availability: BackOrder

ACL Nissan 4 1998cc SR20DE/DET 1991-98 Engine Crankshaft Main Bearing Set

$21.63

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ACL Nissan NX crankshaft main bearing set. This is a 0.050 inch undersize set for rebuilding your engine.

Key Features

Fits 1991-1993 Nissan NX.
Designed for 1998cc SR20DE and SR20DET engines.
This is a 0.050 inch undersize crankshaft main bearing set.
Well-built by ACL for reliable engine performance.
Helps restore proper oil clearance during engine rebuilds.

No-fit, no charge. Wrong part? Send it back, free return label.

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Product Details

You get a full set of crankshaft main bearings in this kit, which means one box handles the whole engine rebuild. These ACL bearings are a 0.050 inch undersize set, designed specifically for the 1991-1993 Nissan NX with the 1998cc SR20DE or SR20DET engine. When you're rebuilding an engine, especially one that's seen some miles, replacing the main bearings is a critical step to ensure proper oil clearance and smooth operation.

ACL has been making engine bearings for a long time, and this set is well-built for the job. They're made to meet the original specifications for your engine, ensuring they'll fit right and perform as expected. Using the correct undersize bearings is essential if your crankshaft has been machined to a 0.050 inch undersize during the rebuild process. This helps restore the proper oil clearance between the crankshaft and the block, which is vital for oil pressure and engine longevity.

When you're putting an engine back together, getting the bearing clearances right is key. This set from ACL gives you the specific size you need if your crankshaft has been turned. Make sure to follow the manufacturer's installation instructions and torque specifications carefully during your engine rebuild.